Mold for rings



(No Model.)

J. J. SULLIVAN.

MOLD FOR RINGS.

No. 433,879. Patented Aug. 5, 1890.

p g k D v, J B 7 Wi I 5% .1 iiii ll 1 l vi fmeooeo 31 1 vewtoz UNITED STATES PATENT OFFICE.

JEREMIAH J. SULLIVAN, OF LUDLOIV, KENTUCKY.

MOLD FOR RINGS.

SPECIFICATION forming part of Letters Patent No. 433,879, dated August 5, 1890.

Application filed April 14, 1890. $erial No. 347,802. (No model.)

To all whom it may concern:

Be it known that I, JEREMIAH J. SULLIVAN, a citizen of the United States, and a resident of Ludlow, in the county of Kenton and State of Kentucky, have invented certain new and useful Improvements in Packing-Rings and Molds for Casting the Same, of which the following is a specification.

My invention relates to a new form of mold for producing split rings adapted for packin g pistons, valve-stems, cylinders, 850. These rings are cast by means of peculiarly-constructed molds, which are set forth in the description of the accompanying drawings, making a part of this specification, in which Figure 1 is a plan view of the base of the mold, one half showing the bottom and the other half showing the top of the base. Fig. 2

. is a similar plan view of a similar mold adapted to cast the reverse form of ring. Fig. 3 is a section, partly in elevation, of Fig. 1, and Fig. 4 is a section, partly in elevation, of Fig. 2. Fig. 5 is a perspective view of the coneshaped core. Fig. 6 is aplan view of the two rings cast in the above form of molds. Fig. 7 is a section on line i; o, Fig. 6.

In order to fully illustrate the process and molds, I have shown two forms of split rings and the molds for casting each of said forms. The preferred form of rings for packing pistons and valve-stems is V-shaped and beveled rings. The drawings illustrate the molds adapted to make these form of rings.

A represents the outside beveled splitring and B the inner V-shaped split ring.

In Fig. 6, a represents a slot formed in the ring, and 1) represents a boss cast upon the inner ring, which fits into the slot or split of the adjacent ring. It is of material advantage to provide this boss nesting in the slot of the adjacent ring, as, first, it prevents the rings from turning and perfectly breaks the joints, and, second,the wide split allows the rings to be made in metal molds. If the ring were cast solid, the composition metal preferably employed for packing-rings would break by contracting in cooling, but the slot allows the rings to shrink without breaking. These rings are cast in the following manner: 1 represents the base of the mold; 2, a central movable core around which the ring is cast to form the inner periphery of the same.

3 represents a mandrel, which is passed through the cone, so as to center and hold it firmly on the base. 4 represents screw-threads out upon the lower projecting end of said mandrel, and 5 a nut for securingin position. I prefer to cast the mandrel with the cone. 0 represents a dowel inserted in the cone,

which projects out from the periphery the I thickness of the ring, so as to form slot a in the ring adapted to admit the hub b. D represents the cap of the mold, which fits down upon the basel, andit is recessed out to fitupon the core 2, as shown in Fig. 3, leaving a space molds adapted to form the inner ring B, the base 1 and cap D being the same general con-- struction. -When, however, it is, desired to make a V or triangular shaped r1n g, the conecore 2 is made with the vertical sides and the recess in the cap D made on the incline, as 8o they are shownin Fig. 4,1eaving a triangular shaped annulus. The dowel 0 (not shown in the drawings) is employed in the same manner as shown in Fig. 5. The gate of this mold is likewise formed in its periphery; but

when the hub b is employed on the ring it is sawed off at the line 11, (shown in Fig. 4,) which leaves the hub 11 and adapts it to nest in the slot of the outer ring A. It is obvious that any desired shape of ring can be made 0 by making the proper shaped central core 2 and recess in the cap D. It is necessary to have the gate of the mold pierced through the periphery of the cap, so that the cap may be removed. If the gate were cut through the face of the mold, the cap could not be removed. It is necessary to employ the dowel C to form the hub A in casting V-shaped or wedgeshaped rings from the center 4, as the presence of the slots allows the rings to spread or open enough to be removed, as well as allowing for contraction when cooling;- hence the dowel C is an essential feature in casting packing-rings with the metal core 2.

The gate 70 Another important advantage is obtained by. use of metal inolds herein described for casting rings of Babbitt metalor other similar composition usually employed in making packing-rings, which is that they can be cast smooth and require little or no finishing except cutting off the gates.

I do not wish to limit myself to the use of the mandrel 3 with the nut 5 for securing the molds together, as dowels or other means may be employed in lieu thereof. This is the preferred form of construction.

Having described my invention, What I claim is A mold for casting split packing-rings, consisting of the base 1, the conical core 2, detachably secured to the base and provided with the projecting center mandrel 3, a dowel C, car-' 

